Description: Wordpress can't cope with /%day%/%monthnum%/%year%/ for some reason. That is to day, it fails when you try to go for an archive in the form of /date/month/year/ This teaches it some manners. Probably/hopefully shouldn't interfere with other structures, but why you'd activate it if you don't need it I wouldn't know.

//This should only be done when the rewrite rules are changing, Ie. When this plugin is activated(Or Deactivated), For simplicity while developing using WP Rewrite, I flush the rules on every page load